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9#include <linux/kernel.h>
10#include <linux/slab.h>
11#include <linux/input.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/timer.h>
15#include <linux/maple.h>
16
17MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
18MODULE_DESCRIPTION("SEGA Dreamcast mouse driver");
19MODULE_LICENSE("GPL");
20
21struct dc_mouse {
22 struct input_dev *dev;
23 struct maple_device *mdev;
24};
25
26static void dc_mouse_callback(struct mapleq *mq)
27{
28 int buttons, relx, rely, relz;
29 struct maple_device *mapledev = mq->dev;
30 struct dc_mouse *mse = maple_get_drvdata(mapledev);
31 struct input_dev *dev = mse->dev;
32 unsigned char *res = mq->recvbuf->buf;
33
34 buttons = ~res[8];
35 relx = *(unsigned short *)(res + 12) - 512;
36 rely = *(unsigned short *)(res + 14) - 512;
37 relz = *(unsigned short *)(res + 16) - 512;
38
39 input_report_key(dev, BTN_LEFT, buttons & 4);
40 input_report_key(dev, BTN_MIDDLE, buttons & 9);
41 input_report_key(dev, BTN_RIGHT, buttons & 2);
42 input_report_rel(dev, REL_X, relx);
43 input_report_rel(dev, REL_Y, rely);
44 input_report_rel(dev, REL_WHEEL, relz);
45 input_sync(dev);
46}
47
48static int dc_mouse_open(struct input_dev *dev)
49{
50 struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev));
51
52 maple_getcond_callback(mse->mdev, dc_mouse_callback, HZ/50,
53 MAPLE_FUNC_MOUSE);
54
55 return 0;
56}
57
58static void dc_mouse_close(struct input_dev *dev)
59{
60 struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev));
61
62 maple_getcond_callback(mse->mdev, dc_mouse_callback, 0,
63 MAPLE_FUNC_MOUSE);
64}
65
66
67static int probe_maple_mouse(struct device *dev)
68{
69 struct maple_device *mdev = to_maple_dev(dev);
70 struct maple_driver *mdrv = to_maple_driver(dev->driver);
71 int error;
72 struct input_dev *input_dev;
73 struct dc_mouse *mse;
74
75 mse = kzalloc(sizeof(struct dc_mouse), GFP_KERNEL);
76 if (!mse) {
77 error = -ENOMEM;
78 goto fail;
79 }
80
81 input_dev = input_allocate_device();
82 if (!input_dev) {
83 error = -ENOMEM;
84 goto fail_nomem;
85 }
86
87 mse->dev = input_dev;
88 mse->mdev = mdev;
89
90 input_set_drvdata(input_dev, mse);
91 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
92 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
93 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
94 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
95 BIT_MASK(REL_WHEEL);
96 input_dev->open = dc_mouse_open;
97 input_dev->close = dc_mouse_close;
98 input_dev->name = mdev->product_name;
99 input_dev->id.bustype = BUS_HOST;
100 error = input_register_device(input_dev);
101 if (error)
102 goto fail_register;
103
104 mdev->driver = mdrv;
105 maple_set_drvdata(mdev, mse);
106
107 return error;
108
109fail_register:
110 input_free_device(input_dev);
111fail_nomem:
112 kfree(mse);
113fail:
114 return error;
115}
116
117static int remove_maple_mouse(struct device *dev)
118{
119 struct maple_device *mdev = to_maple_dev(dev);
120 struct dc_mouse *mse = maple_get_drvdata(mdev);
121
122 mdev->callback = NULL;
123 input_unregister_device(mse->dev);
124 maple_set_drvdata(mdev, NULL);
125 kfree(mse);
126
127 return 0;
128}
129
130static struct maple_driver dc_mouse_driver = {
131 .function = MAPLE_FUNC_MOUSE,
132 .drv = {
133 .name = "Dreamcast_mouse",
134 .probe = probe_maple_mouse,
135 .remove = remove_maple_mouse,
136 },
137};
138
139static int __init dc_mouse_init(void)
140{
141 return maple_driver_register(&dc_mouse_driver);
142}
143
144static void __exit dc_mouse_exit(void)
145{
146 maple_driver_unregister(&dc_mouse_driver);
147}
148
149module_init(dc_mouse_init);
150module_exit(dc_mouse_exit);
151
